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Bright Sensors’ Gas Quality Calculator

Gas Composition

Select reference conditions:
Select output units:
Methane (CH4): %
Ethane (C2H6): %
Propane (C3H8): %
Butane (n-C4H10): %
Isobutane (i-C4H10): %
Pentane (n-C5H12): %
Isopentane (i-C5H12): %
Neopentane (neo-C5H12): %
Hexane (n-C6H14): %
Heptane (n-C7H16): %
Octane (n-C8H18): %
Nonane (n-C9H20): %
Decane (n-C10H22): %
Ethylene (C2H4): %
Hydrogen (H2): %
Hydrogen Sulfide (H2S): %
Nitrogen (N2): %
Oxygen (O2): %
Carbon Dioxide (CO2): %
Carbon Monoxide (CO): %
Water vapor (H2O): %
Total percentage: %

Gas Properties

  • Enter the gas compositions in percentages and click Calculate

The Gross and Net Calorific Value, Gross and Net Wobbe Index, Density, Relative Density, Compressibility and Stoichiometric Air-Fuel Ratio are calculated with variable reference conditions. Check the standard reference conditions in your region to ensure correct results.

This calculator uses ISO 6976:2016 and GPA 2172-19 to determine the Wobbe Index, Calorific Value, Density, Relative Density and Compressibility of a natural gas blend. The Methane Number is calculated using ISO 23306:2020.

The Air-Fuel Ratio is calculated on a volumetric basis with the oxygen in air assumed to be 20.946% by volume.

The calculator is developed by Bright Sensors SA and the same calculation is deployed in our plug & play and affordable gas quality analyzers like the BlueEye™ Ex-D and the BlueEye™ Mobile. For more information on our products, any questions about gas quality sensing or feedback on this calculator please contact us.